Bump codecov/codecov-action from 4 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -69,7 +69,7 @@ jobs:
       working-directory: tests
 
     - if: matrix.mpi == 'mpich' && startsWith(matrix.os, 'ubuntu')
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
         files: test/coverage.xml
         name: ${{ matrix.os }}-${{ matrix.mpi }}-${{ matrix.py }}